This video explanation is clear and the teacher does a good job explaining what a triangular prism is. The steps are also shown when doing the calculations. I believe that a student would learn how to calculate the surface area of a triangular prism. Her tone of voice is engaging and she keeps a good pace throughout the tutorial. The props that she uses are a good element for a lesson.
The screen she writes on could have been more clear and she could write out her work more neatly. She also doesn't explain why the area is cm^2. She also needs to work on communicating and her math terminology.
I like how he explains how to create the formula for calculating the volume of a triangular prism. He also explains that there are variations with math equations. He shows all his steps and explains how he is doing the math. There are no hidden steps.
I do feel that he has a few distractions in this tutorial. He should have cleared his board space so the focus would be on his lesson and centered himself in the frame. A title would also be a good thing to add.
I like how in this tutorial, the definition of circumference is mentioned. He also explains how Pi can be defined. I like how is derives the equation to find the circumference of a circle. Instead of just showing students how to plug and play with an equation, they can understand where it comes from. I really like how he does the calculations with a calculator so the viewer can see what he is punching in.
I really liked the visuals in this video, and think that it is extremely effective in explaining the concept of area to students. I think it could be improved by the author including a sample problem at the end of the video.
This video cuts up the cylinder into its three basic shaped (two circles and a rectangle) and then explains to the student that in order to find it's surface area, one must find the sum of all three individual pieces. The author goes about this with helpful visuals. When he is finding the area of the two circles, he uses the radius. This video could be improved by drawing the radius into the picture so that the student better understands the meaning of the radius. Finally, I think the inclusion of actual units (centimeters squared rather than simply units squared) would improve the applicability of this video.
The screen she writes on could have been more clear and she could write out her work more neatly. She also doesn't explain why the area is cm^2. She also needs to work on communicating and her math terminology.
I do feel that he has a few distractions in this tutorial. He should have cleared his board space so the focus would be on his lesson and centered himself in the frame. A title would also be a good thing to add.